We're not talking about perversion in any form, but about small animals shaped out of stone. It is believed that stones contain the souls of lost earthly predators. The carved animal, or fetish, is thought to contain the power of the creature it is carved into. The owners of the fetishes can obtain this power through the fetish. The best fetishes are not the highly carved ones, but the rough ones because the original animal shape is evident.
You can buy fetishes at nearly any store in Sante Fe. Choose wisely because you want one that will give you the power it holds.